Phil Harris and Dennis Day rode the popularity of Jack Benny on their own programs on NBC. In fact, for the first two years of its run, Harris' show immediately followed Benny's.
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Jungle Jim 39-11-04 210 Stacey
Duffys Tavern 1950-03-30 (357) Tony Martin Pretends to Be Du
Gunsmoke 52-09-26 (xxx) The Railroad (rehearsal)(forced date to show in proper place)